Which of the following is a primary function of the circulatory system?

Question

BlackTom AI · Accepted Answer

Let’s break down each option to see what the circulatory system mainly does.

Option a: 'Producing hormones for regulating body functions.' While the endocrine system primarily handles hormone production, the circulatory system can transport hormones to target organs, but producing them is not its primary function. This makes the statement incorrect as a description of the circulatory system’s main role.

Option b: 'Providing structural support to the skeletal system.' Structural support is the job of the skeletal and related connective tissues, not the circulatory system. Blood vessels and blood do not contribute to supporting the skeleton’s form, so this is not accurate for the circulatory system.

Option c: 'Transporting nutrients and oxygen to the body's tissues.' This captures a core purpose of the circulatory system: circulating blood that carries oxygen and nutrients to cells throughout the body and removing waste products. It aligns with fundamental physiology and is the most accurate description among the choices.

Option d: 'Generating electrical signals for muscle contraction.' The generation and conduction of electrical impulses in the heart (and nerves for muscles elsewhere) involve the cardiac conduction system and nervous system interactions, but the phrase ‘generating electrical signals for muscle contraction’ is not a primary function of the circulatory system itself. The primary function is transport, not signal generation.

In summary, each incorrect option highlights a common misconception: hormones are produced by glands (endocrine system), bones provide structure (skeletal system), and electrical signaling is a neural/cardiac conduction process rather than a circulatory task. The correct concept emphasizes the transport role of the circulatory system in delivering nutrients and oxygen to tissues, which underpins cellular metabolism and energy production.

Which of the following is a primary function of the circulatory system?

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